ADI AD7617 16通路14位数据采集系统(DAS)解决方案
ADI公司的AD7617是16通路同步取样的14位数据采集系统(DAS),包括了模拟输入箝位保护,一个双路14 位电荷再分配逐次逼近寄存器(SAR)模数转换器(ADC),一个灵活的数字滤波器,2.5 V 基准电压源和基准电压缓冲器以及高速串行和并行接口(SPI)/QSPI™/DSP/MICROWIRE,+5 V 电源供电,可以适应±10 V、±5 V 和 ±2.5 V真正双极性输入信号,主要用在电力线路监控,保护继电器,多相电机控制,仪表和控制系统和数据采集系统 (DAS).本文介绍了AD7617主要特性,功能框图,外币部连接电路,以及评估板EVAL-AD7616SDZ/EVAL-AD7616-PSDZ主要特性,框图,测量建立图,电路图,材料清单和PCB设计图.
The AD7617 is a 14-bit, DAS that supports dual simultaneoussampling of 16 channels. The AD7617 operates from a single +5 Vsupply and can accommodate ±10 V, ±5 V, and ±2.5 V true bipolarinput signals while sampling at throughput rates up to 1 MSPSper channel pair with 85 dB signal-to-noise ratio (SNR). HigherSNR performance can be achieved with the on-chip oversamplingmode (85.3 dB for an oversampling ratio (OSR) of 2).
The input clamp protection circuitry can tolerate voltages up to±21 V. The AD7617 has 1 MΩ analog input impedance, regardlessof sampling frequency. The single-supply operation, on-chipfiltering, and high input impedance eliminate the need fordriver op amps and external bipolar supplies.
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